Results 21 to 30 of about 5,361,465 (264)

Hot Methane Spectra for Astrophysical Applications [PDF]

, 2012
In this thesis line lists for methane (CH4) are presented. These line lists were obtained at high temperatures (300-1400 oC at 100 oC intervals) by recording infrared emission spectra with a tube furnace to heat to the required temperatures and a Fourier
Beale, Christopher
core   +5 more sources

Spectral line-by-line pulse shaping of on-chip microresonator frequency combs [PDF]

, 2011
Recently, on-chip comb generation methods based on nonlinear optical modulation in ultrahigh-quality-factor monolithic microresonators have been demonstrated, where two pump photons are transformed into sideband photons in a four-wave-mixing process ...
Lei Chen, Wang, Jian, Daniel E. Leaird, Andrew M. Weiner, Miao, Houxun, Chen, Lei, Ferdous, Fahmida, Leaird, Daniel E., Srinivasan, Kartik, Kartik Srinivasan, Varghese, Leo Tom, Leo Tom Varghese, Houxun Miao, Jian Wang, Fahmida Ferdous, Weiner, Andrew M.   +15 more
core   +1 more source

An Updated Line List for NUV Spectral Synthesis in Evolved Stars: Redetermination of the Beryllium Abundance in the Solar Photosphere [PDF]

The Astrophysical Journal, 2018
Abstract Motivated by the desire to measure beryllium abundances in red giant stars, we have constructed a new line list for synthesizing spectra in the near-ultraviolet. Using the Sun, Arcturus, and Pollux as benchmark stars, we explore potential sources of missing continuous opacity and line absorption.
Joleen K. Carlberg, Katia Cunha, Verne V. Smith, José-Dias do Nascimento   +3 more
openaire   +1 more source

ANALYSIS OF THE SPECTRAL ENERGY DISTRIBUTION OFTHE COOLEST RCrB TYPE CARBON STAR DY Per

Odessa Astronomical Publications, 2008
We analysed the spectral energy distribution of the evolved carbon star DY Per by spectral synthesis technique. The red giant shows the photometric features of R CrB type stars.
L. A. Yakovina, A. V. Shavrina, Ya. V. Pavlenko, A. F. Pugach   +3 more
doaj   +1 more source

Retrieval of atmospheric CO₂ vertical profiles from ground-based near-infrared spectra [PDF]

Atmospheric Measurement Techniques, 2021
We evaluate vertical profile retrievals of CO2 from 0.02 cm−1 resolution ground-based near-infrared solar absorption spectra with the GFIT2 algorithm, using improved spectroscopic line lists and line shapes.
S. Roche, K. Strong, D. Wunch, J. Mendonca, C. Sweeney, B. Baier, B. Baier, S. C. Biraud, J. L. Laughner, G. C. Toon, B. J. Connor   +10 more
doaj   +1 more source

Room temperature line lists for deuterated water [PDF]

, 2017
Line lists are presented for six deuterated isotopologues of water vapor namely HD16O, HD17O, HD18O, D16 2 O, D17 2 O and D18 2 O. These line lists are prepared using empirically-determined energy levels, where available, to provide transition ...
Zobov, NF, Polyansky, OL, Naumenko, OV, Voronin, BA, Lodi, L, Tennyson, J, Liu, A, Hu, SM, Kyuberis, AA   +8 more
core   +2 more sources

A LIBS Spectral Self-Absorption Correction Method Using Voigt Profile Fitting for the Application of Magnesium Analysis in Phosphorus Ore

, 2020
The concentration of MgO is one of the most important parameters in the phosphate ore flotation. The fast detection of the concentration of MgO has great significance for the optimization of the flotation, the improvement of the efficiency and the ...
Sun Lan-xiang, Qi Li-feng, Zeng Peng, Zhang Peng, Yu Hai-bin   +4 more
core   +1 more source

Infrared Spectra of Small Radicals for Exoplanetary Spectroscopy: OH, NH, CN and CH: The State of Current Knowledge

Molecules, 2023
In this study, we present a current state-of-the-art review of middle-to-near IR emission spectra of four simple astrophysically relevant molecular radicals—OH, NH, CN and CH.
Svatopluk Civiš, Adam Pastorek, Martin Ferus, Sergei N. Yurchenko, Noor-Ines Boudjema   +4 more
doaj   +1 more source

Waiting lists, waiting times and admissions: an empirical analysis at hospital and general practice level [PDF]

, 2004
We report an empirical analysis of the responses of the supply and demand for secondary care to waiting list size and waiting times. Whereas previous empirical analyses have used data aggregated to area level, our analysis is novel in that it focuses ...
Frank Windmeijer, Windmeijer, Frank, Windmeijer, F, Hoonhout, Pierre, Hugh S Gravelle, Gravell, Hugh, Gravelle, H, Hugh Gravelle, Hoonhout, P., Pierre Hoonhout, Gravelle, H., Windmeijer, F., Hoonhout, P   +12 more
core   +1 more source

ON THE GF-VALUES FOR SOME DIATOMIC MOLECULAR SPECTRA

Odessa Astronomical Publications, 2017
In view of rich structure of the energy levels and the variety of transition types which are observable, molecules are the useful tool for investigation of physical parameters of stellar atmospheres, interstellar and circumstellar matter.
L. A. Kuznetsova, A. V. Shavrina
doaj   +1 more source